优先受让权是指特定人依法律规定或合同约定而享有的、在权利人处分标的物于第三人时，得以同等条件优先于他人而受让的权利。
当事人一方转让其共有的专利申请权的，其他各方享有以同等条件优先受让的权利。
If one of the parties transfers its joint right of application for patent, any other party enjoys the priority to acquire the transfer on equal conditions.
至于对于债务人以外的第三人之效力，主要涉及的是双重让与的问题以及受让人与其他债权人的优先权问题。
As for the validity to the third party, it mainly concerns the problem of double assignment and the priority right of the assignee and the other creditors.
研究开发人转让专利申请权的，委托人享有以同等条件优先受让的权利。
Commissioning party has the right of first refusal under the same conditions.
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